20530424 has 16 divisors (see below), whose sum is σ = 40759200. Its totient is φ = 9661312.

The previous prime is 20530423. The next prime is 20530427. The reversal of 20530424 is 42403502.

It is a junction number, because it is equal to n+sod(n) for n = 20530396 and 20530405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75344 + ... + 75615.

It is an arithmetic number, because the mean of its divisors is an integer number (2547450).

Almost surely, 2^20530424 is an apocalyptic number.

It is an amenable number.

20530424 is a deficient number, since it is larger than the sum of its proper divisors (20228776).

20530424 is a wasteful number, since it uses less digits than its factorization.

20530424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150982 (or 150978 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20530424 is about 4531.0510921860. The cubic root of 20530424 is about 273.8205086547.

Adding to 20530424 its reverse (42403502), we get a palindrome (62933926).

The spelling of 20530424 in words is "twenty million, five hundred thirty thousand, four hundred twenty-four".